/**
 * Copyright © 2016-2018 The Thingsboard Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.thingsboard.server.common.transport.quota;

/**
 * @author Vitaliy Paromskiy
 * @version 1.0
 */
public final class Clock {

    private static long time = 0L;

    private Clock() {
    }


    public static long millis() {
        return time == 0 ? System.currentTimeMillis() : time;
    }

    public static void setMillis(long millis) {
        time = millis;
    }

    public static void shift(long delta) {
        time += delta;
    }

    public static void reset() {
        time = 0;
    }
}
